Exception for Development.Shake.Profile:generateTrace from shake-0.15.5

Math

\[10^{6} \cdot \left(x - x\right)\]

C

double f(double x) {
        double r413991558 = 1000000.0;
        double r413991559 = x;
        double r413991560 = r413991559 - r413991559;
        double r413991561 = r413991558 * r413991560;
        return r413991561;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019173 
(FPCore (x)
  :name "Development.Shake.Profile:generateTrace from shake-0.15.5"

  :herbie-target
  0.0

  (* 1000000.0 (- x x)))

Backtrace

hash-ref: no value found for key key: #<enode 4(4)>		L	C
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	197	2
extractor-extract	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	196	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	35	2
(unnamed)	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	26	0
simplify!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	217	0
run-improve43	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	339	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28